Wagon drill



July 7, 1936. T MURPHY v 2,046,648

' WAGON DRILL I Filed Feb. 3, 1934 3 Sheets-Sheet 1 T. L. MURPHY July 7; 1936.

WAGON DRILL IN VEN TOR A TTORNEY Jul 7, 1936. V

T. L. MURPHY WAGON DRILL 3 Sheets-Sheet 3 Filed Feb. 3, 1954 INVENTOR ATTORNEY l atentecl July 7, 1936 WAGON DRILL Thomas L. Murphy, Athol, Mass, assignor to Worthington Pump and Machinery Corporation, New York, N. Y., a corporation of Virginia Application February 3, 1934, Serial No. 709,578

' 5 Claims. (01. 255-51) This invention relates to rock drill equipment and more particularly to drilling apparatus adapted to be mounted on vehicle frames and known specifically in the art as wagon drills.

The invention comprises in brief, a frame having a substantially vertical tower acting as a guide for a rock drill mounting, and wheels secured to the frame to permit the device to become readily portable. In the present construction the tower comprises a relativelyhigh pair of columns adapted to serve as a guide for comparatively long drill steels. The present invention is directed to means whereby the angle of the drill steel can be accurately maintained, and comprises adjusting mechanism in the vehicle chassis, acting on the chassis supports to compensate for irregularities in the rock face or bench, and without resort to wedges or blocks placed under the supports.

Means are provided also whereby the associated rock. drill may be readily detached "from the mounting or slab back, and to novel construction of the guide means.

One of the objects, therefore, of the present invention is to provide means whereby the wagon drill may be adjusted so that the drill steel may be maintained at or adjustedto a predetermined angle. 1

A second objectis to provide a construction whereby the drill-angle control means may readily and positively change the position of the drill guide without detracting from the rigidity and strength of the chassis.

Afurther object is to providelsimplified construction whereby the rock drill may be slidably mounted in a; guide, possessing ease of adjustment,- and which facilitates; the interchangeability of the rock-1dri1l to suit; the requirements .of the .work. r x

With these objects in view, the invention cons'is'ts of various features of construction and com- ;bination of parts, which will: be first. described in connection with the accompanying drawings showing a wagon drillo-f the preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims. C 1

Other objects and advantages will become apparent from the following description in conjunction' with the accompanying drawings, in which: w 'Fig. 1 is' a side elevation of a preferred form of the wagon drill. 'Fig. 2 is an enlarged section takenon lines -2--2 of Fig. l. I Fig. .3 is-an1 end view of the wagon drill.

Fig. 4 is a cross section taken on the lines 4-4 of Fig. 1.

Fig. 5 is a longitudinal cross section of the rock drill mounting or slab back taken on the lines 55 of Fig. 6.

Fig. 6 is a front elevation of the slab back.

Fig. 7 is a cross sectional view taken on the lines l.'i of Fig. 6.

' The wagon support for the rock drill comprises a chassis Ill and comprises in the preferred form a frame H, a bracket 12, and a beam 13. The bracket i2 is shown secured to a pair of transverse channels 14, mounted on the frame II at approximately its mid-section. The beam [3 is a rigid member of any suitable construction, such as a pair of channel bars or a hollow box spar, and is pivotally connected at one end as by bolt or pin l5. At the opposite extremity, provision is made for a vertical swivel pin IS. The bottom of the swivel is rigidly secured to a fork [1, which serves as a mounting means for the front wheel I8. .A fifth wheel 19 is provided at the intersection of .the fork and at bottom of the beam [6 to take the upward thrust of the wheel and to facilitate the swivel action. A pair of rear wheels 20 are mounted to the frame II in any conventional manner. A handle 2|, mounted to a yoke 22 on the fork ll, serves as a means to guide the vehicle to the desired location for operation.

Projecting upward from the rear end of the frame It, and preferably at right angles to it is a tower 23, and comprising in the preferred form .a pair of channel members or guides 24. A pair of tower supports 25 extend as a bracket from the tower 23 to the front end of frame H. A

plurality of transverse members or rungs 26 connect the two supports and form, in effect, a ladder to enable operators to make adjustments to the rock drill at any point on the tower. A pulley 21 is rotatably mounted at the upper extremity of the channel members 24. Near the bottom of tower 23, and substantially parallel with frame II is a platform 28 upon which is mounted a hoist 29 of any conventional design. An air hoist is shown in Fig. 1, but a manually operated winch will serve the same purpose. A cable 30 extends from the hoist upward around pulley 21 and continues downward to the rock drill -mounting means to be described later.

Wheel-elevating or drill-angle control means is provided and comprises a guide bracket 3| rigidly secured to the frame I I as by longitudinal angles 32 and transverse channels 33. The inner distance between the legs of the bracket conforms closely with the outer width of the beam l3, permitting the beam to travel vertically with a minimum amount of play. To effect the close match of these two parts a plurality of spacers or reinforcing sleeves 34 are secured inside the beam l3 by means of clamp bolts 55, passing thru slots 55 in the sides of the beam lit. The

bolts 55 also hold the clamp 51 in position. Suspended from the top of the inverted bracket 3| is a threaded rod 35, provided with a shoulder 36 beneath the bracket, and a handle or crank 31 having a collar 38 above the bracket. The threaded rod 35 is free to rotate in the guide bracket, the vertical thrust in both directions being taken by the shoulder 36 and the collar 38. Secured to the beam I3 and in alignment with the threaded rod 35 is a follower 39 internally threaded to correspond with the thread on the rod 35. By this construction the beam may be lowered or raised at will following the rotation of the threaded rod 35 turned by the handle or crank3l. r

The slab back or drill mounting means .is best seen in Figs. 5, 6, and '7, of the drawings. .In the present art the term slab back designates a weighted drill feed assembly and its use throughoutthis application will be identifed with'this type of construction. The slab back comprises a cradle or feed slide 40 provided with verticallyaligning holes 4|, adapted to receive throughbolts 42 which correspond with mounting means provided in the rock drill (not forming part of this invention) indicated by broken lines in Fig. 5. As shown in Fig. 5, the cradle 40 is shaped to confrom closely with the contour of the drill. A pair of longitudinal lugs 43 extend the length of the cradle and serve as a means to align and mount the drill and cradle assembly in proper relation .to the slab back. A pair of drill clamps 44 are held to the slab back bed 45 by means of aplurality of cap screws 46. When these bolts are tightened the drill clamps 44 vtightlyengage the longitudinal lugs 43 and bind them firmly in the .slab back bed 45. The slab back bed is mounted closely adjacent and parallel with the outside of the flanges of the channels. The

slab back guide 47 is rabbeted on either side as at 48 to conform closely with the inner, beveled edgeof .the channel flanges, but is spaced sufficiently from them to provide for free sliding action with a minimum amount of play. The slab back guide is held to the bed 45by means of .a plurality of through-bolts 49. The entire slab back assembly is supported by the cable 30 passing around a grommet 55, held in a slot in the slab back bed 45, by means of a pin The pressure applied to the drill steel is supplied by the weight of the rockdrill and its associated slab back, and may be augmented as desired by the adidtion of feed weights 52 shown in Figs. 5

and 6 at the top of the slab back, straddling the cable and being held to the slab back bed by :means of studs 53. The entire slab back may be rigidly/secured to the channel members 24 to "facilitate portability, by the use of locking bolts 54 which are removed when the drill is set for operation.

Inoperation, the wagon drill is transported to a selected site, the handle 2| being used both as a draw bar, and as a steering rod to turn the front wheel l8 about its swivel mounting. If desired the wheels may be replaced by skids or any other suitable chassis supports. Flanged wheels adapted foruse on tracks similarly may be employed without departing from the scope of the invention. -When the wagon has been located at drill steel is made, after which slab back and 5 drill, as aunit, are permitted to descend until the steel bit engages the rock face or bench. The angle of the drill rod can be adjusted by rotating the handle 3! of the elevatingmechanism in the proper direction. If the rod 35 is provided with right hand threads, rotating the handle 31 in a clockwise direction when looking from the top 'will cause the follower and beam l3 to rise in the guide bracket 3|, secured to the frame Expressed in other words, the bracket 3| secured to the front end of the frame II will descend with respect to the beam I3. Referring to Fig. 1, it will be seen that bylowering the front end of the frame II with respect to the beam such as will be produced by clockwise movement of the 0 handle 31', will cause the beam to move about its pivot l5, and the tower will become tilted in a counter-clockwise direction about wheel 20, thereby varying the angle ,of the guide with respect to the vertical. To adjust the drill rod 5 to an angle either on the left side orthe right side of the vertical, it will simply. be necessary to turn the, handle 31 in a clockwise or counterclockwisev direction respectively. When the tow- .er is being moved in a clockwise direction the thrust is taken up by ,the shoulder 36 at the top of the guide bracket 3|. If desired, greater rigidity maybe obtained by tightening the clamp bolts 55, after the proper angular adjustment has been made. p 1

After the proper angular adjustment has been made, the apparatus will be ready for operation, the rock drill preferably being; actuated by air supplied through the conventional flexible hoses .(not shown).

. When it is desired to substitute rock drills as may become necessary by a change in Working conditions or material, the substitution may-be eifected by merely removing the two bolts 42, releasing the rock drill from the cradle. The oper- 'ation is reversed when installing the new rock drill. .The slab back unit slides along the fianges' of commercial channels which do not require special machining or surfacing for satisfactory operation.

The wagon drill is shown provided with a three wheel support as it has been found easier to obtain a solid setting on an uneven surface when three 7 wheels are usedthan when four wheels are used,

to the lefthas beendescribed as the front, and the portion to the right as the rear; the tower has been shown mounted at the rear. I may transpose I the wheels sothat the tower is adjacent the end having. but one wheel and supply two wheels as support for the opposite end, without departing from the spirit of the present invention; I may also provide the. beam 3 in any position best adapted to the working conditions. and to the relative dimensions of the associated parts. Thus though the beam is shown infthe'prefer'red embodimentas being pivotally mounted abovethe frame I it may be supported with equal advan-' tage either-below the frame I or on a level with ,75

it, corresponding compensation being made in the elevating mechanism.

As described, the angle adjusting mechanism comprising the beam I 3 and the elevating mechanism provides for a deviation in the angle of the tower within appreciable limits predicated upon the relative proportions of the parts. By employing a threaded rod and a handle to rotate the rod, this angle may be varied by small increments. The elevating mechanism, rather than tending to weaken the chassis, strengthens it by providing reinforcement at a point at which it is normally subjected to the greatest stress, to wit, near the mid-section. The elevating action is positive and direct, and no extra locking means are required. A large portion of the chassis, comprising the frame I I, the tower support 25, the stand 28, and the hoist 29, for all general purposes, are all in- V tegral with the channel members 24, forming the guide for the slab back. Their combined moment of inertia will oppose any sudden shocks produced by the slab back and will tend to minimize vibration and oscillation of the tower structure 23.

It will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown, but that these may be modified widely within the invention defined by the claims.

What is claimed is:

1. In a wagon drill, a chassis including a frame, supporting means for said frame, a beam pivotally mounted with respect to said frame, supporting means for said beam, a tower secured to said frame and substantially perpendicular to it, drill mounting means carried by said tower and comprising a guide member, a bed secured to said guide member, said guide member being free to slide with respect to said tower, a drill cradle secured to said bed, a rock drill detachably carried by said cradle and adjustable means connecting said beam and said frame for regulating the angle of said tower.

2. In a wagon drill, a chassis including a frame, a tower at one end of said frame and perpendicular thereto, supporting wheels attached to the frame at the end adjacent said tower, a beam pivotally connected to said frame, a supporting wheel carried by said beam, a guide member slidably carried by said tower, means for detachably mounting a rock drill on said guide, means for moving said slide member along said tower, and adjustable means connected to said beam and said frame for adjusting the elevation of the beam carried supporting wheel for regulating the angle of said tower.

3. In a wagon drill, a chassis including a fame, a pair of supporting wheels at one end of said frame, a tower connected to said frame at the end adjacent to said supporting wheels, drill mounting means slidable along said tower and comprising a guide member, a drill cradle carried by the guide member, means connected to said guide member for moving it along said tower, a beam pivotally connected to said frame, a swivelly mounted supporting wheel carried by said beam, adjustable means connected to said beam and to said frame for adjusting the elevation of said swivelly mounted supporting wheel with respect to the frame for regulating the angle of said tower.

4. In a wagon drill, a chassis, said chassis having a frame, supporting means for said frame, a beam pivotally mounted with respect to said frame, supporting means for said beam, a tower secured to said frame and substantially perpendicular to it, said tower comprising a plurality of structural columns, drill mounting means comprising a guide member, a bed, said guide member and said bed being secured one to the other, said guide member being rabbeted to conform with longitudinally extending projections on said columns and being free to slide with respect to said columns, a drill cradle secured to said bed, fastening means connecting with said cradle and being adapted to detachably mount a rock drill to said cradle.

5. In a wagon drill a chassis, said chassis having a frame, supporting means for said frame, a beam pivotally mounted with respect to said frame, supporting means for said beam, a tower secured to said frame and substantially perpendicular to it, said tower comprising a plurality of structural columns, drill mounting means comprising a guide member, a bed, said guide member and said bed being secured one to the other, said guide member being rabbeted to conform with longitudinally extending projections on said columns and being free to slide with respect to said columns, a drill cradle secured to said bed, fastening means connecting with said cradle and being adapted to detachably mount a rock drill to said cradle, and adjustable means intermediate said beam and said frame for regulating the angle of said tower.

THOMAS L. MURPHY. 

